/Engine/Source/Runtime/Engine/Public/Animation/AttributesRuntime.h
Copy attributes from source, and remap the bone indices according to BoneMapToSource
static void CopyAndRemapAttributes ( const [FMeshAttributeContainer](API\Runtime\Engine\Animation\FMeshAttributeContainer) & SourceAttributes, [FStackAttributeContainer](API\Runtime\Engine\Animation\FStackAttributeContainer) & OutAttributes, const [TMap](API\Runtime\Core\Containers\TMap)< int32, int32 > & BoneMapToSource, const [FBoneContainer](API\Runtime\Engine\FBoneContainer) & RequiredBones )